Light as a phenomenon has been researched for several thousands of years, and in relation to it, there are different theories about its expansion. A human observes light with a sense of sight and within a limited range of its noticeable wavelengths very tiny differences are recognized as colours. In a modern world, we are exposed to everyday light, both natural and artificial one. However, the biggest problem for our health is the exposure to artificial light, which imitates daily light. A person's one-day biological rhythm or a circadian rhythm determines basic physiological activities according to the change of day and night. It is responsible for the production of melatonin, an antioxidant that fights against the development of cancer cells. Artificial light used during the night, as well as night work, can disrupt production of melatonin and that way expose our organism to various diseases. Nowadays, there are documents making a legal framework in connection to lighting at workplace, which guarantee for its safe and quality use. These are The Employment Protection Act as the foundation for making many other Rulebooks related to lighting at workplaces, as well as the norms for light and illuminance of indoor and outdoor workplaces. The choice of lighting depends on a number of key factors, as well as its purpose. In this work, the results of illuminance measurement in the plant for the production of bee scones concerning the measurement spots encompassing the plant, the warehouse and the mill, were be presented. The purpose of these investigations is the review of compatibility of the existing arrangement of lighting units to valid regulations. The measurements showed that there is a need to review and improve the lighting fixtures and to harmonize the layout of the lighting fixtures with current regulations and the lighting of individual workplaces, which must be safe, functional and aesthetically pleasing.